דברי הימים א, פרק ח׳, פסוק ג׳

Genealogical records serve as a map of history, showing how ancient families expanded and evolved across generations. When these family trees list individuals as direct children, the intent is often much broader, referring to descendants who lived many years later [ביאור שטיינזלץ].

Earlier records in the Torah identify Ard and Naaman as the two primary leaders of Bela's family. As time passed, the name Ard shifted slightly in the records to Addar. Over the years, this family line continued to grow and branch out. Eventually, new leaders emerged within Addar's expanding household, bringing individuals like Gera and Abihud into positions of prominence as heads of their own new family branches [מלבי״ם].